I started to think this was just an rng fest and was about to demote it, but I played around with a bit more.Stay crouched and slide in carefully. He will attack forward a LOT less you stay crouched. Also, it's hard to land the exact spot but there

26 Nov
7:35 2016

is actually a sweet spot where if you are crouched he won't be able to hit you with either attack. http://imgur.com/a/6ZYgh